In Genesis 18:22, this signifies the Lord's thought from His Human conjoined and adjoined with His Divine. (Arcana Coelestia 2245, 2247)

In Genesis 24:13, this signifies the state of conjunction of truth divine in the Human. (Arcana Coelestia 3065)

In Genesis 24:30, this signifies the presence of truth in general external knowledge of the natural man. (Arcana Coelestia 3135)

In Exodus 18:13, this signifies obedience from truth divine. (Arcana Coelestia 8686)

In Revelation 7:9, this signifies hearing the Lord and doing His Commandments. (Apocalypse Revealed 366)

In Psalm 1:1, to walk expresses life of thought from intention; to stand expresses the life of the intention from the will; and to sit, the life of the will. (Apocalypse Explained 687)

'To sit before Jehovah' is to be with Him, and so, it also means willing and acting from Him. 'To stand before Him,' is to look to and understand His will, and 'to walk before Him,' is to live according to His precepts, so from Him.

366. Standing before the throne and before the Lamb. This symbolically means, listening to the Lord and doing what He commands.

To stand before the Lord means, symbolically, to hear and do what He commands, like one who stands before a king.

This is also the symbolic meaning of standing before God, or in the presence of God, elsewhere in the Word, as when the angel said to Zacharias,

I am Gabriel, who stands in the presence of God... (Luke 1:19)

A man who stands before Me shall not be cut off forever. (Jeremiah 35:19)

These are the two offspring of the olive tree, who stand before the Lord of the whole earth. (Zechariah 4:14)

(He) separated the tribe of Levi... to stand before Jehovah... (Deuteronomy 10:8)

And so on elsewhere.